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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 10 |
| 6 | 31 |
| 7 | 70 |
| 8 | 190 |
| 9 | 561 |
| 10 | 2191 |
| 11 | 6226 |
| 12 | 22683 |
| 13 | 74152 |
| 14 | 283349 |
| 15 | 1211354 |
| 16 | 4572672 |
| 17 | 18844177 |
| 18 | 77585825 |
| 19 | 327472752 |
| 20 | 1418056071 |
| 21 | 7083303437 |
| 22 | 31251988918 |
| 23 | 153456264178 |
| 24 | 723293387594 |
| 25 | 3596567095155 |
| 26 | 17360616601051 |
| 27 | 89955643932801 |
| 28 | 486526881887485 |
| 29 | 2551613423040841 |
| 30 | 14029592127656040 |
| 31 | 76756835252971657 |
| 32 | 428044848852530252 |
[1,1,1,3,4,10,31,70,190,561,2191,6226,22683,74152, 283349,1211354,4572672,18844177,77585825, 327472752,1418056071,7083303437,31251988918, 153456264178,723293387594,3596567095155, 17360616601051,89955643932801,486526881887485, 2551613423040841,14029592127656040, 76756835252971657,428044848852530252] |